Cushioning attachment for power-hammers.



0. L. BOGKUS & R. GJHAUSDORPER:

GUSHIONING ATTACHMENT FOR POWER HAMMERS.

APPLICATION FILED JAN. 26, 1911 Patented Aug. 15, 1911.

Fig. 1

ncense.

U IT L T CHARLES L. BDCKUS, F DETROIT,

MICHIGAN, AND REINHOLD G. HAUSDORFER, 0F TOLEDO, OHIO.

CUSEIONIN'G ATTACHMENT FOR POWER-HAMIKERS.

Specification of Letters Patent. Patggni gfi Aug, 15., 1911,

Application filed. January 26, 1911. Serial No. 604,703.

' HAI'SDORFER, a citizen of the United States,

residing at Toledo, county of Lucas, State of Ohio, have invented acertain new and useful Improvement in Cushioning Attachments forPower-Hammers, and declare the following to be a full, clear, and exactdescription of the same, such as will enable others skilled in the artto which-it pertains to make and use the same, reference being had tothe accompanyingdrawings, which form a part of this specification.

This invention relates to power hammers.

It has for its object an improved cushioning attachment adapted tocushion the hammer on the up or return stroke, after the blow has beengiven.

In the drawings :-Figure 1, is a side elevation of the hammer cylinder,and the cushioningattachment thereto. Fig. 2, is a sectional elevationof the cushioning attachment. Fig. 3, is a side elevation of thecushioning piston.

The hammer piston 1 and the hammer cylinder 2 are of the standardconstructionof upright cylinder with piston moving vertically therein,into which steam is admitted under the piston and above the piston fromthat can reciprocate in an independent cylinder 7 secured to the upperend of the main cylinder. The independent cylinder 7 is furnished withsteam through pipe 8 which reaches from the main feed pipe 3 and isinclined upward from its receiving end to the end where it delivers intothe cylinder 7 just above the upper surface of the piston 6 when thepiston 6 is at.i.ts lowermost position. The piston 6 acts as a valve toclose the passage between the cylinder 7 and the cylinder 2. As soon asthe main piston engagesthe cushioning piston and lifts it very slightly,the port-through whlch the steam enters from the pipe-8 is closed, thechamber still containing aquantity of'steam at boiler pressure whichcompresses and acts as a cushion to prevent any injurious result fromthe too sudden lift or the too great liftof the hammer piston.

Provision for the admission of oil is made through pipe 9 which leadsdirectly into chamber 10, which chamber is a guide for the stem 11 ofthe cushioning piston 6: the oil admitted through the pipe 9 lubricatesnot only the cushioning piston but also the.

mer, having in combination with a main cylinder a. piston reciprocatingtherein, a cushioning cylinder located above andhaving a passageconnecting with said main cylinder. the said cushioning cylinderprovided with an auxiliary chamber at its top, a cushioning pistonreciprocating in said cushioning cylinder, a stem attached to saidcushioning piston reciprocating in said passage between the twocylinders. somewhat spaced from the confining wall of said passage andadapted to be engaged by the pis ton of the main cylinder. :1 secondstem attached to the opposite side of said piston and adapted toreciprocate in said auxiliary chamber as a guide. and a steam inlet portarranged to admit steam into said cushioning cylinder above thecushioningpiston, the said cushioning piston and first-mentioned stembeing thereby adapted to act as a valve controlling the passage betweenthe two cylinders and about the first-mentioned stem. substantially asdescribed.

2. In combination with a main cylinder, a power hammer, a cushioningcylinder. arranged above the inain cylinder, a cushioning pistonreciprocating .in said cushioning cylinder, a piston reciprocating inthe mainL cylinder, a stem projecting from said cushing piston into themain cylinder, adapted to be engaged by the piston therein, means forintroducing and exhausting steam from above the cushioning cylinder, thehead of the cushioning cylinder having a chamber and an oil pipe leadingthereinto, and a sec- I mer, having in combination with a main the topof the cushioning piston and reciprocating in said chamber, whereby oilmay be introduced into the cushioning cylinder, lubricating thecushioning piston, and thence find its way into the main cylinderlubrieating its piston, substantially as described.

3. A cushioning piston for a power ham- Iner, having in combination withmain cylinder a piston reciprocatingtherein, a cushioning cylinderlocated above and having a passage communicating with the main cylinder,a cushioning piston reciprocating in said cushioning cylinder, a stemattached to said cushioning piston reciprocating loosely in said passagecommunicating be tween the two cylinders and adapted to be engaged bythe piston of the main cylinder, and a steam inlet port arranged toadmit steam into said cushioning cylinder above the cushioning piston,thesaid cushioning piston and stem being thereby adapted to act as avalve controlling the passage com-,

municating between the two cylinders, substantially as described.

4. A cushioning piston for a power hamcylinder a piston reciprocatingtherein, a cushioning cylinder located above and having a passagecommunicating with said main cylinder, a cushioning piston reciprocatingin said cushioning cylinder, a stem attached to said piston,reciprocating loosely in said passage communicating between thecylinders, and adapted to be engaged by the piston of the main cylinder,means for introducing oil above said cushioning piston, and a steaminlet port arranged to adeating in said cushioning cylinder, a stemthrough said passage into the main cylinder and adapted to be engaged bythe piston and main cylinder, and an independent supply of steamadmitted into the cushioning cylinder just above the cushioning pistonwhen atrest, said cushioning piston being thereby adapted, in itsinitial movement upward, to cut offthe steam supply and en-' trap thesteamin the cushioning cylinder as a cushioning element, substantiallyas described.

In testimony whereof, we sign this speci- I fication in the presence oftwo witnesses.

CHARLES L. BOGKUS. REINHOLD G. HAUSDORFER. Witnesses:

LOTTA LEE BRAY, R. A. PA KER.

depending from said cushioning pistongz

